EP1087849A1 - Dispositif de cintrage par rouleaux pour cages de laminoir - Google Patents

Dispositif de cintrage par rouleaux pour cages de laminoir

Info

Publication number
EP1087849A1
EP1087849A1 EP99927858A EP99927858A EP1087849A1 EP 1087849 A1 EP1087849 A1 EP 1087849A1 EP 99927858 A EP99927858 A EP 99927858A EP 99927858 A EP99927858 A EP 99927858A EP 1087849 A1 EP1087849 A1 EP 1087849A1
Authority
EP
European Patent Office
Prior art keywords
chock
roll
bending
rod
rolls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99927858A
Other languages
German (de)
English (en)
Other versions
EP1087849B1 (fr
Inventor
Antonino Rossi
Cesare Maiandi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group SpA
Original Assignee
SMS Demag Innse SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Demag Innse SpA filed Critical SMS Demag Innse SpA
Publication of EP1087849A1 publication Critical patent/EP1087849A1/fr
Application granted granted Critical
Publication of EP1087849B1 publication Critical patent/EP1087849B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/203—Balancing rolls

Definitions

  • the invention relates to those devices which are applied, in stands for rolling strips or other flat products, to the working rolls, to the backup rolls or to rolls of other types, in order to bend them and to cause them to adopt a deformed configuration which improves the quality of rolling.
  • bending devices consist, in practice, of normal hydraulic jacks which act on the chock supporting the working rolls, along axes perpendicular to the strip to be rolled; the jacks are generally housed in blocks fixed to the uprights of the load- bearing structure of the stand and, as a result of their action, the axis of the working roll is deformed along a curved line which may be concave or convex, according to requirements.
  • This prior document describes a set of cylinder-piston units intended to bend the working rolls of the rolling stand, which act on the chocks thereof in a combined manner so as to prevent any play between the chocks and the aforementioned units. This eliminates the risk of impacts while setting the bending forces, particularly when these forces are reversed in order to change the direction of bending of the rolls (that is, in order to change from positive deformation to negative deformation of their axes, or vice versa).
  • the bending devices considered in this patent are formed basically by pairs of (partial) jaws which can be operated independently in opposite directions and which act on the roll chocks in order to bring about their bending in opposite directions.
  • each jaw which act on the roll chocks are formed on respective shaped bodies arranged at the ends of hydraulically-operated rods; this means that, in order to form each jaw, it is necessary to have two separate, differently-shaped bodies acting along respective parallel axes and which move in opposite directions, in order to grip the chock likewise a jaw.
  • each body related to the upper working roll is combined with one of the lower working roll, thus permitting a reduction in size and a limitation of the number of ducts required to supply the operating fluid, the fact that the bodies forming a same jaw slide along corresponding separate axes is rather disadvantageous.
  • a solution of this type does in fact compensate for the unbalanced action mentioned above; this is because the body which is interposed between the other two acts on the chock (urging it upwards, or downwards, according to the chock concerned) in the opposite direction to the other two, and the resulting combined effect produces two pairs of equal and opposite forces which thus cancel one another out.
  • the object of the present invention is therefore to provide a device for bending the rolls of a rolling stand, having structural and functional characteristics such as to overcome the problems encountered in the prior art considered above.
  • Figure 1 shows a side view of a rolling stand in which the bending devices according to the invention are fitted, with a portion removed for clarity;
  • Figure 2 is an enlarged, partially-sectioned view of a portion of Figure 1, showing a device of the invention.
  • the first figure shows a stand for rolling strips or other flat products, in which a pair of opposed working rolls 1 and 2 are reinforced, respectively, by backup rolls 3 and 4.
  • the working rolls 1, 2 and the backup rolls 3, 4 are borne by corresponding chocks 9, 10 and 11, 12, mounted in the structure 7 in known manner; the bending devices 20 of the present invention act on the chocks 9 and 10 of the working rolls.
  • each chock 9, 10 of the working rolls 1, 2 there are two devices 20 that are arranged one on each side, in opposed positions.
  • Each device 20 consists of a block 21 fixed to one of the uprights of the structure of the stand and provided with a cylindrical cavity 22; this cavity is in communication, by means of ducts 23, 24 and 25 extending through the block 21, with a pump, not shown in the drawings, for supplying an operating fluid.
  • the cavity 22 is bounded at the top by a sealing ring 26.
  • a first piston 30 fixed to a rod 31, is slidable in the cavity 22, the rod being disposed centrally along the axis of the cavity with its end 31a remote from the piston 30 projecting beyond the sealing ring 26.
  • a second piston 32 and a sleeve 33 fixed thereto are mounted coaxially for sliding relative to the rod 31; the second piston 32 also slides in a similar manner to the first one along the walls of the cavity 22, whereas the opposite end of the sleeve 33 projects beyond the ring 26 which provides a seal against leakage of oil from the cavity 22 towards the exterior.
  • the pistons 30 and 32 divide the cavity 22 into an upper annular chamber 22a, a cylindrical chamber 22b, and an intermediate chamber 22c, which respectively communicate with the ducts 23, 25 and 24.
  • small blocks 38 and 39 are advantageously positioned between the surfaces which move relative to one another such as, for example, the hook 35 and the block 21, or the block 21 and the chock 9, to facilitate sliding.
  • the operation of the bending device according to the invention can be understood from the foregoing description.
  • pistons 30 and 32 are moved upwards or downwards according to requirements, by the supply of oil or another fluid under pressure to the cavity 22 through the ducts 23, 24 and 25.
  • the projecting end 31a of the rod 31 urges the appendage 9a of the chocks upwards, whilst the hook 35 at this stage exerts a small (balancing) force produced by the supply of oil to the annular chamber 22a at low pressure, to ensure it maintains contact with the appendage 9a from the upper side thereof; also hook 35 is therefore moved in the direction (upward) of the bending force produced, in this case, by the piston 30.
  • the second piston 32 is urged downwards whilst the sleeve 33 fixed thereto slides relative to the rod 31 and the movement thereof is therefore transmitted to the hook 35 which thus exerts a downward force on the appendage 9a of the chock 9, so as to bring about the desired negative bending.
  • the rod 31 applies a slight upward (balancing) force to the appendage 9a in order to keep itself in contact therewith, as described above for the hook 35.
  • the bending device according to the invention in practice acts as a clamp which grips the appendage 9a for raising and lowering it, as required.
  • the elements which act on the appendage, that is, the hook 35 and the rod 31, advantageously remain in contact therewith even when the direction of the bending imparted to the rolls is reversed, thus avoiding the risk of damaging impacts during the operation of the device.
  • the elements which serve to "grip" the chock of the roll to be bent that is, the hook 35 and the projecting end of the rod 31
  • those which form the jaws in European patent No. 623 401 move along the same axis, that is to say, the axis of the cylindrical chamber 22, of the rod 31, and of the sleeve 33, this axis being common to all of these elements.
  • this solution is particularly favourable because it simplifies the device structurally, given that only one cavity is now required for housing two pistons which move the members for gripping the chock (the hook 35 and the rod 31); naturally, the aspects connected with the operation of the device, that is, the number of ducts necessary for supplying the operating fluid and its control system are also advantageously reduced.
  • the device of the invention can be formed either independently, that is, with each device structurally and functionally separate from the others present in the rolling stand, or in an interconnected manner, as just explained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rolling Contact Bearings (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

L'invention concerne un dispositif de cintrage par rouleaux destiné à être utilisé dans des cages pour le laminage de bandes et de produits plats en général. Ledit dispositif comprend une tige (31) et un élément (35) de type crochet qui permet de prendre un appendice (9a) de l'empoise (9) du rouleau (1) à cintrer, la tige et l'élément de type crochet étant respectivement actionnés par des pistons (30, 32) hydrauliques coulissant dans une cavité cylindrique (22). L'élément (35) de type crochet est avantageusement formé sur l'extrémité d'un manchon (33) couplé coulissant à la tige (31). On obtient ainsi un dispositif compact à faible encombrement, et les effets que les éléments (31, 35) exercent sur l'empoise (9) du rouleau (1) sont équilibrés du fait qu'ils se déplacent le long du même axe de travail.
EP99927858A 1998-06-17 1999-06-02 Dispositif de cintrage par rouleaux pour cages de laminoir Expired - Lifetime EP1087849B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI981382 1998-06-17
ITMI981382 IT1301734B1 (it) 1998-06-17 1998-06-17 Dispositivo di flessione dei rulli per gabbie di laminazione.
PCT/EP1999/003846 WO1999065621A1 (fr) 1998-06-17 1999-06-02 Dispositif de cintrage par rouleaux pour cages de laminoir

Publications (2)

Publication Number Publication Date
EP1087849A1 true EP1087849A1 (fr) 2001-04-04
EP1087849B1 EP1087849B1 (fr) 2002-08-21

Family

ID=11380262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99927858A Expired - Lifetime EP1087849B1 (fr) 1998-06-17 1999-06-02 Dispositif de cintrage par rouleaux pour cages de laminoir

Country Status (6)

Country Link
EP (1) EP1087849B1 (fr)
AR (1) AR019156A1 (fr)
AU (1) AU4506099A (fr)
DE (1) DE69902591T2 (fr)
IT (1) IT1301734B1 (fr)
WO (1) WO1999065621A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101733288B (zh) * 2008-11-04 2011-09-28 上海重型机器厂有限公司 用于中厚板轧机的上下主传动轴的平衡装置
US8132440B2 (en) 2005-10-10 2012-03-13 Siemens Vai Metals Technologies Ltd. Roll bending device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1315119B1 (it) 2000-09-25 2003-02-03 Danieli Off Mecc Dispositivo e metodo per curvare i cilindri di una gabbia dilaminazione.
DE10333883B3 (de) * 2003-07-25 2004-10-07 ACHENBACH BUSCHHüTTEN GMBH Biegevorrichtung für die Walzen eines Mehrwalzengerüstes
WO2012049183A1 (fr) 2010-10-12 2012-04-19 Sms Siemag Ag Cage de laminoir
CN101966532A (zh) * 2010-11-03 2011-02-09 大连华锐股份有限公司 基于六辊轧机的复合式正负弯辊装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58199605A (ja) * 1982-05-17 1983-11-21 Hitachi Ltd ロ−ルベンデイング装置
DE4314472A1 (de) * 1993-05-03 1994-11-10 Schloemann Siemag Ag Biegeblock zum Biegen der Walzen von Mehrwalzen-Walzgerüsten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9965621A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8132440B2 (en) 2005-10-10 2012-03-13 Siemens Vai Metals Technologies Ltd. Roll bending device
CN101733288B (zh) * 2008-11-04 2011-09-28 上海重型机器厂有限公司 用于中厚板轧机的上下主传动轴的平衡装置

Also Published As

Publication number Publication date
DE69902591D1 (de) 2002-09-26
DE69902591T2 (de) 2003-04-24
AU4506099A (en) 2000-01-05
IT1301734B1 (it) 2000-07-07
AR019156A1 (es) 2001-12-26
WO1999065621A1 (fr) 1999-12-23
EP1087849B1 (fr) 2002-08-21
ITMI981382A1 (it) 1999-12-17

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